If Naruto was Orochimaru's brother in the fanfiction, his character development would take a unique turn. Naruto is known for his positive attitude and his belief in the power of friendship. But with Orochimaru as his brother, he might be more conflicted. He could have access to Orochimaru's knowledge earlier, which would impact his training. He might be shunned by some in the village due to his relation to Orochimaru. This would force him to question his place in the village and his own values more deeply, and his growth would be centered around how he reconciles his connection to Orochimaru with his own identity and goals.
In such a fanfiction, Naruto's character development would be completely different. He would probably grow up with a sense of isolation. Since Orochimaru was an outcast, Naruto might face similar situations. This could make him more cynical about the world around him. However, Naruto's inherent goodness might also make him try to break away from Orochimaru's shadow. He might strive to prove that he is not like his brother, which could lead to a very different kind of hero's journey compared to the original Naruto story.
Naruto's character development could be significantly altered. If Orochimaru saves him, Naruto may start to question his own beliefs about redemption. He has always believed in giving second chances, but being saved by Orochimaru could test the limits of that belief. He might struggle with whether Orochimaru can truly be redeemed or if he is just using Naruto. This internal struggle could make Naruto more introspective and less impulsive. He may also become more cautious in his relationships, not wanting to be used again. And his view of power might change too. He could see that power can be used in different ways, not just for good like he always thought, which would add more depth to his character.
Well, it could enhance his jutsu arsenal significantly. Orochimaru has a vast knowledge of various jutsus. Naruto might gain access to Orochimaru's snake - based jutsus like the Hidden Shadow Snake Hands. Also, Orochimaru is very proficient in forbidden jutsus. Naruto could potentially have a better understanding of these dangerous techniques, but he would also have to deal with the darker aspects of Orochimaru's power and the possible corruption it might bring to his own chakra nature.
It makes Naruto seem more mysterious. Since Orochimaru is a rather enigmatic and often villainous character, Naruto looking like him in the fanfiction gives him an air of mystery that he doesn't typically have in the original series. People reading the fanfiction might start to question Naruto's true nature.
Naruto would likely become more secretive. Since Orochimaru is a very private and often devious character, Naruto might pick up some of those traits. He would probably keep things from his friends more often.
Well, initially, the curse mark might make Naruto more aggressive. He has to constantly fight the dark influence it brings. This could lead to him being more isolated as he fears hurting his friends. But in the long run, it also gives him a new source of power to master, which in turn makes him more determined and self - aware in his growth.
Naruto could develop a new sense of determination. He might be determined to not let Orochimaru's experiments define him. Instead, he could use what has happened as a motivation to become stronger in his own way. He may also start to study more about the type of experiments Orochimaru was doing, not to replicate them, but to find ways to counter any future threats related to that kind of science.
Well, Naruto's character might become more morally ambiguous at first. Since Orochimaru is a rather shady character, Naruto could start to question some of his previous beliefs. He might become more power - hungry, but also more self - reliant in a way as he tries to master the new power. However, he could also struggle with the darker aspects of Orochimaru's power, like having to use some underhanded tactics.
Naruto would likely become more secretive. Since Orochimaru's training methods are often not in line with Konoha's values, Naruto would have to hide what he's learning. He might also become more distrustful of others as Orochimaru could instill in him the idea that everyone is out to get him for his newfound power.
In some fanfictions, Orochimaru might develop a sense of loyalty towards Naruto. After being around Naruto for a while, he could see Naruto as someone worthy of his loyalty. This could lead to him being more open to working with the Hidden Leaf and helping Naruto in his various missions. He might even sacrifice his own interests to protect Naruto at times, which is a complete turnaround from his initial character.
Naruto would become more cunning. Orochimaru is a very sly character, and his training would likely rub off on Naruto. Naruto would no longer be as straightforward in his battles and interactions. He might start to think several steps ahead, like Orochimaru does.